- From: Benjamin Hawkes-Lewis <bhawkeslewis@googlemail.com>
- Date: Sun, 30 Jan 2011 13:17:43 +0000
- To: Charles Pritchard <chuck@jumis.com>
- Cc: public-canvas-api@w3.org, Richard Schwerdtfeger <schwer@us.ibm.com>, franko@microsoft.com, david.bolter@gmail.com, public-html-a11y@w3.org, swarren@aisquared.com, tlalor@aisquared.com, dmazzoni@google.com
On Sun, Jan 30, 2011 at 6:55 AM, Charles Pritchard <chuck@jumis.com> wrote: > http://dl.dropbox.com/u/17337752/a11y-goog-case.png Does this illustrate a use-case or technical requirement? If so, what is it? Indicating the link with current focus? > Attached is a screenshot of "Google Instant" keyboard navigation; > my caret is on the bottom-most link. > > When tab is used, a focus ring is drawn on various elements. > > drawFocusRing is not typically used for "caret" ui controls. What do you mean? How can we even speak about "typical" usage at this point? > setCaretSelectionRect is useful for indicating sub-regions. What are "sub-regions"? > http://dl.dropbox.com/u/17337752/a11y-bing-case.png > > Attached is a screenshot of "Bing Images", with an image selected via mouse. > > Though bing image search does not seem to have workable keyboard navigation, > it's still a reasonable use case. What's the end-user functionality here? Allow user to choose an image link from a list of image links as part of an image search interface? > In this area, drawFocusRing might apply to the outermost rectangle, > and caret selection would define a 'sub-focus' on the secondary content, > below the selected image. Would it? Why? > The existing whatwg model of drawFocusRing requires an x,y parameter: > That parameter was dropped in our new, proposal. So are you saying your proposal should restore it? > setCaretSelectionRect adds on width and height data, as a better means > of "hinting" to the AT software. Better than what? > The word caret is used, because it corresponds to 'caret' APIs on many > platforms, including Java and Windows. It's most often used with text > content, with "height" and "height" parameter hinting at the font-size. Note carets are also used next to images inline with text. > http://dl.dropbox.com/u/17337752/a11y-combobox-case.png > > This screen shot recreates what I see when using an AT software package > with caret tracking. Which package? > Two arrows point to the area in which the caret currently has focus. > > This information can be a bit difficult to pull out of an input element, > as scrollLeft and scrollWidth have mixed support with vendors (stated in > aria-practices document). If UAs consistently implemented: http://www.w3.org/TR/cssom-view/#scroll-attributes would that solve this problem? > 'Caret' tracking is not well defined for composite elements: > > http://www.w3.org/TR/2010/WD-wai-aria-practices-20100916/ Does this link illustrate an end-user use-case or technical requirement? If so, what is it? -- Benjamin Hawkes-Lewis
Received on Sunday, 30 January 2011 13:19:18 UTC